Microvette assembly



FIG. 1 is an exploded perspective view of a microcuvette assembly showing our new design, the details of three of the microcuvette units being omitted for convenience of illustration;

FIG. 2 is a top plan view of the microcuvette _assembly with all four units in the frame;

FIG. 3 is a side elevational view of the microcuvette assembly;

FIG. 4 is a bottom plan view of the microcuvette assembly. 

The ornamental design for a microcuvette assembly, substantially as shown and described. 